// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/common/font_list.h"

#include <string.h>
#include <windows.h>

#include <set>

#include "base/strings/string16.h"
#include "base/values.h"

namespace content {

static int CALLBACK EnumFontFamExProc(ENUMLOGFONTEXW* logical_font,
    NEWTEXTMETRICEXW* physical_font,
    DWORD font_type,
    LPARAM lparam)
{
    std::set<base::string16>* font_names = reinterpret_cast<std::set<base::string16>*>(lparam);
    if (font_names) {
        const LOGFONTW& lf = logical_font->elfLogFont;
        if (lf.lfFaceName[0] && lf.lfFaceName[0] != '@') {
            base::string16 face_name(lf.lfFaceName);
            font_names->insert(face_name);
        }
    }
    return 1;
}

std::unique_ptr<base::ListValue> GetFontList_SlowBlocking()
{
    std::set<base::string16> font_names;

    LOGFONTW logfont;
    memset(&logfont, 0, sizeof(logfont));
    logfont.lfCharSet = DEFAULT_CHARSET;

    HDC hdc = ::GetDC(NULL);
    ::EnumFontFamiliesExW(hdc, &logfont, (FONTENUMPROCW)&EnumFontFamExProc,
        (LPARAM)&font_names, 0);
    ::ReleaseDC(NULL, hdc);

    std::unique_ptr<base::ListValue> font_list(new base::ListValue);
    std::set<base::string16>::iterator iter;
    for (iter = font_names.begin(); iter != font_names.end(); ++iter) {
        base::ListValue* font_item = new base::ListValue();
        font_item->Append(new base::StringValue(*iter));
        font_item->Append(new base::StringValue(*iter));
        font_list->Append(font_item);
    }
    return font_list;
}

} // namespace content
